April 1867. A first-class compartment on the train from King’s Cross to Lincoln contains a man dressed as a senior churchman and a powerful attendant guarding a leather bag. By evening, Scotland Yard has received news of a shooting and the theft of a valuable silver model of Lincoln Cathedral.
Colbeck and Leeming pursue the murderer through a city crowded for its annual horse fair. The disguise, the stolen model and the Bishop of Lincoln’s urgent request suggest that the thief remains close enough to manipulate the inquiry, forcing the detectives to separate ceremonial appearance from criminal purpose.